{ GPC demo program for the GetOpt functions.
Comfortable command line option parsing.
Copyright (C) 1998-2006 Free Software Foundation, Inc.
Author: Frank Heckenbach
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
published by the Free Software Foundation, version 2.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; see the file COPYING. If not, write to
the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
As a special exception, if you incorporate even large parts of the
code of this demo program into another program with substantially
different functionality, this does not cause the other program to
be covered by the GNU General Public License. This exception does
not however invalidate any other reasons why it might be covered
by the GNU General Public License. }
program GetOptDemo;
uses GPC;
var
ch, LongOptFlag: Char;
i, LongIndex: Integer;
const
LongOptions: array [1 .. 4] of OptionType =
(('x', NoArgument, nil, 'x'),
('noarg', NoArgument, @LongOptFlag, #2),
('reqarg', RequiredArgument, @LongOptFlag, #3),
('optarg', OptionalArgument, @LongOptFlag, #4));
begin
if ParamCount = 0 then
begin
WriteLn (StdErr, 'GetOpt demo');
WriteLn (StdErr, 'Usage: ', ParamStr (0), ' [-n] [-r foo] [-o[bar]] [--noarg] [--reqarg foo] ');
WriteLn (StdErr, ' [--optarg[=bar]] [--x] [baz...]');
Halt (1)
end;
LongIndex := -1;
repeat
ch := GetOptLong ('nr:o::', LongOptions, LongIndex, True);
case ch of
EndOfOptions : Break;
NoOption : Write ('no-option argument');
UnknownOption: if UnknownOptionCharacter = UnknownLongOption then
Write ('(incorrect long option)')
else
Write ('unknown option `', UnknownOptionCharacter, '''');
LongOption : with LongOptions[LongIndex] do
begin
Write ('long option `', CString2String (OptionName), '''');
if Ord (LongOptFlag) <> LongIndex then
Write (' ')
end;
else Write ('option `', ch, '''')
end;
if HasOptionArgument then
WriteLn (' with argument `', OptionArgument, '''')
else
WriteLn
until False;
if (FirstNonOption < 1) or (FirstNonOption > ParamCount + 1) then
begin
WriteLn (StdErr, 'Internal error with FirstNonOption.');
Halt (2)
end;
if FirstNonOption <= ParamCount then WriteLn ('Remaining arguments:');
for i := FirstNonOption to ParamCount do WriteLn (ParamStr (i))
end.